Biology Question Bank for Entrance Exam – Cell Structure

Biology Question Bank for Entrance Exams

For AIPMT Main other Medical Entrance Exam Prepration, Question Bank for Biology Cell Structure is given below.IMPORTANT POINTS

All living organism are made up of cell. cell is a structural and functinal unit of organism. some organisms are unicellular while others are multicellular. Each cell is having potentiality to produce a new individual.This is called totipotency of cell.

On the basis of presence or absence of membrane bound nucleus, organisms are classified into prokaryotes and eukaryotes. Eukaryotes include plants and animals hence,eukaryotic cells are further classified into plant cells and animal cells.

Major differences between plant cells and animal cells are presence of cell wall,plastids and vacuole in plant cells. A typical eukaryotic cell consists of a cell membrane,cytoplasm and nucleus. Cell membrane also called plasma-membrane is the outermost layer of animal cell and located inner to cell wall in plant cell.

Endoplasmic reticulum is made up of cisternae.Endoplasmic reticulum having ribosomes on its outer- surface is called rough endo- plasnic reticulum.It is associated with the synthesis of protein. Endoplasmic reticulum without ribosomes is known as smooth endoplasmic reticulum. It take part in the synthesis of lipid. Goigi apparatus is made up of flattened sac like structure.

Lysosomes are surrounded by a single layer wall.They contain enzymes which digest all macromolecules. In plant cell large vacuole are present which possess a membrane called tonoplast. As the mitochondria are associated with the generation of ATP they are called power house of cell. The chloroplast is a double layered structure and possess grana and stroma. 70s type ribosomes are present in prokaryotic cells while 80s type of ribosomes are present in eukaryotic cells. The shape of cytoplasm and the shape of cell is maintained by cytoskeleton which is made up of microfilament, microtubules and intermediate filaments. Eukaryotic cell possesses nucleas, nucler membrane,nucleous and chromatin. Depending on the position of centromere chromosomes are four types, like Metacentric,sub-metacentric,Acrocentric and Telocentric.

1. It is responsible for begininig of the life of organisms.

(A) Tissue (B) Zygote (C) Cell (D) Embryonic layer

2. Who proposed the cell theory.

(A) Singer and Nicholsen (B) Schwann and schleiden

(C) Hook and Brown (D) Robertson

3. Who proposed that new cells arise through cell division of pre-existing cells.

(A) Robert Hook (B) Rudolf Virchow

(C) Robert Brown (D) Singer

4. It is the Smallest Cell.

(A) Bacteria (B) Mycoplasm (C) Yeast (D) Blue green algae

5. Prokaryotic cells have which architectural regions?

(A) Cell (B) Appendages (C) Nucleus (D) a-b-c,all

6. The association of more than one ribosome with a single molecule of m-RNA complex is called as…

(A) Polypeptide (B) Polysome (C) Polymer (D) Poly Saccharide

7. Which structure possess flagellin protein?

(A) Muscles fiber (B) Flagellum (C) Pilli (D) a,b,c-all

8. The cell wall of algae is made up of which substance?

(A) Protein (B) Mannans (C) Lipid (D) a,b,c-all

9. The cells involved in large amount of lipid synthesis,do not possess this orgenelle on Endoplasmicreticulum.

(A) Mitochondrion (B) Ribosomes

(C) Golgi apparatus (D) lysosome

10. In mitochodria, it contains F-particles.

(A) Matrix (B) Cristae (C) Outer layer (D) a-b-c,all

11. The materials essential for dark reaction are located in

(A) Circular-DNA (B) Thylakoids (C) Stroma (D) Ribosomes

12. Microfilaments are made up of

(A) Fat (B) Protein (C)Carbohydrates (D) Nucleic acid

13. It possess Flagella.

(A) Paramoecium (B) Euglena (C) Amoeba (D)Yeast

14. It directs formation of the bipolar spindle during cell division.

(A) Golgi body (B) Centriole (C) Ribosome (D) Cilia

15. In human which cell lacks nucleus.

(A) Lymphocyte (B) RBC (C) Monocytes (D) Neutrophils

16. The unit of phloem in which nucleus is absent.

(A) Sieve cell (B) Sieve tube

(C) Companion cell (D) Phloem parenchyma

17. No membrane surrouds in this organelle.

(A)Lysosome (B)Nucleolus (C)Golgi body (D)Nucleus

18. It actively synthesized r-RNA.

(A) Nucleoplasm (B) Nucleolus (C)Nucleus (D)a-b-c,all

19. In each chromosome centromere possessing disc shaped structure is

(A) Satellite (B) Kinetochore (C) Long arm (D) Short arm

20. Bacteria possess small DNA other than circular DNA which is called as…

(A) Cosmid (B) Plasmid (C) Plastid (D) Starid

21. It shows presence of Nucleoid.

(A) Plant cell (B) Bacteria (C) Animal cell (D) Virus

22. The cell wall of fungi is made up of which substance?

(A) Starch (B) Chitin (C) Cellulose (D) Pectin

23. Which organelle is not considered as a part of Endomembrane system?

(A) Vacuole (B) Chloroplast

(C) Endoplasmic reticulum (D) Lyso some

24. Chromosome in which centromere is located at the end is….

(A) Acrocentric (B) Telo centric

(C) Meta centric (D) Sub-meta centric

25. Select unicellular organism which possess cillia.

(A) Amoeba (B) Paramoecium (C) Yeast (D) Opalina

26. Which is the example of unicellular organism?

(A) Chlamydomonas (B) Spirogyra (C) Mushroom (D) Chiton

27. Who mentioned that cells had a thin layer around them?

(A) Schwann (B) Virchow (C) Schleiden (D)Robert Hook

28. Who mention that the presence of a cell wall is an unique character of the plant cell?

(A) Schwann (B) Virchow (C) Schleiden (D) Robert Brown

29. Which organelles are found only in animal cell?

(A) Centriole (B) Mitochondria (C) Golgi apparatus (D) Chloroplast

30. Which is biggest animal cell?

(A) Ostrich’s egg (B) Hen’s egg (C) PPLO (D) Mycoplasma

31. In some of Bacteria the outer-most layer is a loose sheath layer called as….